I'm trying to model/test a three span bridge, have a few questions:
1. once support lines are defined for two abutments and two piers, beam layout and beams are defined accordingly, I try to generate beam report and noticed this: if beam ends at support line at abutments (see attached), beam reports in spans 1 & 3 can be generated, however, if I want to have beam projection over the support lines (supposed to), no beam reports will be generated. However, there is no problem for span 2 where beam projection are defined at both piers.
2. Bearing seats at abutments - WP for both abutments are defined at front face of backwall, in order to place abutments properly, I define longitudinal offset of -1' and 1' for abut 1 and abut 2 respectively (as seen). For left abutment, I assume bearings have beam seat, and bearing and seats are properly defined; for right abutment, I assume bearing seats are stepped, however, the stepped seat are outside of abutment.
Please add your file to the thread or send it directly to me to have a look at your model. Add all your referenced files, if any.
vlad.grigoras@bentley.com
Bridge Wizard.dgn
Vlad,
I'm attaching the .dgn file for your review. the problem is at support line 1, where centerline of bearings is set at supportline, beam end is 9" offset back station from centerline of bearing/support line, abutment is 12" offset back station from centerline of bearing/supportline. Thanks.
You have entered a 0.00 value for bearing line ahead offset and this was causing the bearing seat to go outside. I have placed a 0.75 value, as per the end value and everything looks good. Please let me know if this has solved your problem.
Vlad, thank you for the response. Normally I would like to think support line is centerline of bearings, and span length is defined as the distance between centerline of bearings, we can then define end of beam and location of abutment by utilizing offsets, it appears this is not the case. In Open Bridge, can we assume the support lines for piers are centerline of the pier cap, and we can define centerline of bearing by using ahead and back offset, what about abutments, where do we define support line? WP of abutment, centerline of bearings or beam end? Thanks and have a great weekend.